class TVshow:
    list_film = ["战狼2","红海行动","西游记女儿国","熊出没-变形记"]
    def __init__(self,show):
        self.__show = show
        @property
        def show(self):
            return self.__show
        @show.setter
        def show(self,value):
            if value in TVshow.list_film:
                self.__show = "您选择了 《" + value +"》, 稍后将播放"
            else:
                self.__show = "您点播的电影不存在"              
tvshow = TVshow("战狼2")
print("正在播放: 《",tvshow.show,"》")
print("您可以从",tvshow.list_film,"中选择要点播放的电影")
tvshow.show = "红海行动"
print(tvshow.show)